מכל מלמדײ השכלתי (duchifat) wrote,
מכל מלמדײ השכלתי
duchifat

Стал читать про различие философских концепций времени, в Средние Века и не только. Таких основных концепций две - либо время и пространство существуют объективно, либо являются отношением между наблюдаемыми вещами и событиями.

Наткнулся на описание совершенно крейзи вещи в духе аналитической философии - мысленный эксперимент Синди Шумейкера:

Here is a simplified version of Shoemaker's argument. Consider a small, spatially finite possible world that is divided into three zones, A, B, and C. In Zone A, there is a complete freeze — a cessation of all change — for one hour every 2 years. These local freezes in Zone A are preceded by a short period in which every object in A takes on a reddish glow (observable to the occupants of all three zones), while at the same time a temporary force field develops at the boundary of Zone A, preventing anything from entering or exiting that zone during the freeze. While the freeze in Zone A is taking place, Zone A appears to those in Zones B and C to be pitch black, since no light can enter or exit the frozen zone; but as soon as the local freeze in Zone A is over, the people in the other two zones can again see everything in Zone A, and can in fact see those things resuming their normal behaviors without missing a beat. To those who remain in Zone A for the freeze, it appears that the reddish glowing and the development of the force field are immediately followed, not by any cessation of change, but, instead, by a large number of sudden and discontinuous changes in the other two zones.

Meanwhile, In Zone B there is a similar freeze for one hour every 3 years, and in Zone C there is a freeze for one hour every 5 years. The inhabitants of this strange world quickly become aware of the local freezes, and they have no trouble calculating the “freeze function” for each of the three zones. What's more, they also calculate that there is a global freeze — a period during which each one of the three zones undergoes a local freeze — exactly once every 30 years. Whenever a global freeze occurs, of course, no one is able to see any frozen objects or blacked-out zones, since everyone and everything is frozen at the same time. But the reddish glowing and the development of temporary force fields that precede each world-wide freeze are observable to everyone; and so the global freeze times come to be celebrated by “empty time parties” all over the world.

No doubt the inhabitants of this unusual world could come up with a theory that explains the local freezes in a way that doesn't posit any empty time. For they could theorize that in Zone A there is a local freeze every two years, except for the 30th year, when there is no freeze; and similarly for the other zones. But such a theory would involve freezing functions that are more complicated than those that entail a global freeze every 30 years.

What is this thought experiment supposed to show? Well, it can't be taken to show that global freezes are possible, because (at least the way the story has been told here) they are simply a stipulated detail of the story, and we can't show that something is possible merely by stipulating that it is the case in some possible world. What the thought experiment does seem to show, however, is that it is possible for rational beings to have at least some evidence for the existence of periods of empty time in their world.

Я могу придумать аналогичный парадокс про деньги. Представим, что в стране Лимонии объявили деноминацию: один рубль стал как десять рублей. При этом одновременно изменили в 10 раз все цены и зарплаты, долги в вклады. И для удобства решили не печатать новые банкноты а объявили, что банкнота в один старый рубль будет считаться за 10 новых. Понятно, что никто из жителей Лимонии просто ничего не заметит. И только туристы из соседней Апельсинии, меняя на границе свои апельсинские гривны на лимонийские рубли, вдруг обнаружат...

Короче, по-моему, не парадокс это, а хоботом груши околачивание. :)
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